Re: [PATCH v3 00/56] Convert DSI code to use drm_mipi_dsi and drm_panel

Tomi Valkeinen
2020-11-06T14:37:54Z

On 05/11/2020 20:56, H. Nikolaus Schaller wrote:
>
>> Am 05.11.2020 um 19:28 schrieb Tomi Valkeinen <tomi.valkeinen@ti.com>:
>>
>> On 05/11/2020 20:14, H. Nikolaus Schaller wrote:
>>>
>>>> Am 05.11.2020 um 18:36 schrieb Tomi Valkeinen <tomi.valkeinen@ti.com>:
>>>>
>>>> Hi,
>>>>
>>>> On 05/11/2020 19:15, H. Nikolaus Schaller wrote:
>>>>
>>>>> Next, I migrated my long waiting mipi_dsi/drm_panel driver conversion for
>>>>> the panel of the Pyra handheld (omap 5 based) to compile on 5.10-rc2. And
>>>>> I followed the latest existing panel-orisetech-otm8009a.c which uses a
>>>>> similar video mode controller and mipi-dsi.
>>>>>
>>>>> That one seems to be used by arch/arm/boot/dts/stm32f469-disco.dts.
>>>>>
>>>>> Unfortunately my panel driver is not even loaded by drm/omap so I can't
>>>>> debug. Does this set of drm/omap drivers need a modification of the device
>>>>> tree? If yes, which one?
>>>>
>>>> omapdrm doesn't load the panel drivers. If not even your panel's probe is called, then it hints at
>>>> DT and/or driver's compatible string issue. The panel's probe should get called even if omapdrm is
>>>> not loaded at all.
>>>
>>> Well, I use the same device tree that loads the old driver...
>>
>> Yeah, I was mistaken above. With DSI the panel (may be) a child of the DSI host, so it will affect.
>>
>> Can you give pointers to the panel driver source and relevant dts files? BOE BTL507212-W677L?
>
> Yes. It is (now)
>
> drivers/gpu/drm/panel/panel-boe-btl507212-w677l.c
>
> and
>
> arch/arm/boot/dts/omap5-letux-cortex15-common.dtsi (for the basic dsi definitions)
> arch/arm/boot/dts/pyra-display.dtsi (for the specific display)
>
> All this is merged by some arch/arm/boot/dts/omap5-letux-cortex15-v5.3+pyra-v5.2.dts

I took the driver and make my omap4-sdp dts to use it. It probes for me, but stop after that:

[ 119.346374] omapdss_dss 58000000.dss: supply vdda_video not found, using dummy regulator
[ 119.358398] DSS: OMAP DSS rev 4.0
[ 119.680053] panel-dsi-cm 58004000.encoder.0: failed to get video timing, using defaults
[ 119.695709] panel-dsi-cm 58004000.encoder.0: supply vpnl not found, using dummy regulator
[ 119.711242] panel-dsi-cm 58004000.encoder.0: supply vddi not found, using dummy regulator
[ 119.769470] panel-btl507212-w677l 58005000.encoder.0: w677l_probe
[ 119.779388] panel-btl507212-w677l 58005000.encoder.0: w677l_probe ok
[ 119.846679] omapdss_dss 58000000.dss: bound 58001000.dispc (ops dispc_component_ops [omapdrm])
[ 119.858673] omapdss_dss 58000000.dss: bound 58004000.encoder (ops dsi_component_ops [omapdrm])
[ 119.882629] omapdss_dss 58000000.dss: bound 58005000.encoder (ops dsi_component_ops [omapdrm])
[ 119.902069] omapdss_dss 58000000.dss: bound 58006000.encoder (ops hdmi4_component_ops [omapdrm])
[ 119.962066] dmm 4e000000.dmm: initialized all PAT entries
[ 120.014770] panel-btl507212-w677l 58005000.encoder.0: w677l_get_modes

I didn't debug yet where it's hanging. So you're not even getting the probe?

Tomi